Efficient dual layer interconnect coating for high temperature electrochemical devices
Publication: Research - peer-review › Journal article – Annual report year: 2012
Effects of novel dual layer coatings Co3O4/La0.85Sr0.15MnO3−δ on high temperature oxidation behaviour of candidate steels for interconnects are studied at 1123 K in flowing simulated ambient air (air + 1% H2O) and oxygen. Four alloys are investigated: Crofer 22 APU, Crofer 22 H, E-Brite and AL 29-4C. The reaction kinetics is followed by measuring the mass increase of the samples over time. The oxide scale microstructure and chemical composition are investigated by scanning electron microscopy/energy dispersive spectroscopy. The kinetic data follow the parabolic rate law. It is found that the oxidation reaction is limited by outward Cr3+ diffusion in the chromia scale. The coating effectively reduces the oxidation rate. Reactions and cation inter-diffusion between the coating and the oxide scale are observed. Long term effects of these interactions are discussed and practical implications for interconnect electrochemical performance are suggested.
Original language | English |
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Journal | International Journal of Hydrogen Energy |
Volume | 37 |
Issue number | 19 |
Pages (from-to) | 14501-14510 |
ISSN | 0360-3199 |
DOIs | |
State | Published - 2012 |
Citations | Web of Science® Times Cited: 25 |
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- Corrosion, Interconnect, Coating, Parabolic oxidation, Chromia
Keywords
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ID: 10783522